installation, operating and service instructions eva series boiler

E. ELECTRICAL
1. General. Install wiring and ground boiler in
accordance with authority having jurisdiction or in
absence of such requirements National Electrical
Code, ANSI/NFPA 70 and/or CSA C22.1 Electrical
Code.
WARNING
Failure to properly wire electrical
connections to the boiler may result in
serious physical harm. DO NOT ATTACH
ADDITIONAL J-Box to back or top of boiler
jacket.
WARNING
The wiring diagrams contained in this
manual are for reference purposes only.
Each boiler may be wired differently
according to the specifications given to
Thermal Solutions at the time the boiler was
purchased. Always use the wiring diagram
provided with the boiler. If the wiring
diagram provided with the boiler is
unavailable, STOP all wiring work and
contact Thermal Solutions for a
replacement diagram.
DANGER
Positively assure all electrical connections
are unpowered before attempting
installation or service of electrical
components or connections of the boiler or
building. Lock out all electrical boxes with
padlock once power is turned off.
2. Connect the main power supply and ground from
fused disconnect to proper boiler electrical leads
located in the junction box at the rear of the boiler.
Refer to electrical consumption plate on boiler
jacket.
3. Remove factory supplied jumper wire from
terminals 4 and 5. Connect field supplied safety
limits or devices (low water cut-off, temperature
limit etc.) in series using proper terminals provided
in boiler electrical cabinet. Refer to wiring diagram
supplied with boiler for wiring information. Refer to
Figures 9a, 9b, and 9c, for typical wiring diagrams.
Refer to Figure 1, for electrical requirements for
WARNING
Do not directly connect low voltage (24 volt,
milliamp etc.) controls to this boiler. If low
voltage controls are desired, isolating
relays must be used.
WARNING
Never jump out any safety controls.
5. Following pages have sample wiring diagrams.
Contact Thermal Solutions Representative or visit
website (www.thermalsolutions.com) for current
wiring options.
6. An as-built wiring diagram is included with every
boiler when it ships.
CAUTION
Each boiler must be protected with a
dedicated properly sized fused disconnect.
WARNING
Electrical power may be supplied from more
than one service. Make sure all power is off
before attempting any electrical work.
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